Auxiliary heater for furnaces



July 19, 1927-. v 1,636,173

A E. F. DIEHM AUXILIARY HEATER FOR FURNACES Filed Nov. 6. 1925 2 Sheets-Sheet 1 July 19 1927' E. F. DIEHM AUXILIARY H EATER FOR FURNACES Filed Nov. 6. 1925 2 Sheets-Sheet 2 Patented July 19, 1927.

UNITED STATES PATENT; OFFICE.

ERNST'F. DIEHM, 0F AKRON, OHIO, VSSEIGNOR T0 XJKTH CENTURY'HEATING AN D VEN.-

TILATING COMPANY; OF AKRON, OHIO, A. .CORIORATION ,OF OHIO.

AUXILIARY HEATER FOR FIIRNACS.

Application led November 6, 1925. Serial No.,67,281.

This invention relates to furnaces such as used for heating-buildings or residences by hot air, and particularly to anl improved auxiliary kgas heater adapted to be used in connection and inl combination with a coal furnace of ,theI usual type. v

The objectsof the invention are to improve upon attachmentsof this general nature and to secure thegreatest possible heating capacity with la minimum of fuel consumption. The device is especially intended and adapted as an `auxiliary heater to be used when the cold weather is notsevere enough to require a large coal fire. The heater may be usedas a substitute for the coal furnaceduring the autumn and spring days, although it may beusedduring the entire Winter season if desired. Simplicity of design and efficiency are the principal beneiiciafl results obtained by the invention, although other objects and advantages will be secured as will be evident to those skilled in this art. c

In the drawings is shown one form of the invention as it has been perfected, it being understood that changes and modifications may be made within the scope of the invention as set forth in the claims hereto appended.

Figure 1 is a: perspective view of a furnace of any usual or preferred type, that shown being adapted for the burning of soft coal, a portion of the outer casing being broken away to show the method of mounting the auxiliary burner or burners in place;

Figure 2 is a horizontal section on a larger scale Figure 3 is a side view of the heater per se;

Figure 4 is a vertical section on the line Ll--fi of Figure 3;

Figure 5 is a plan; and

,Figures 6 and 7 are horizontal sections on the lines 6-6 and 7--7 of Figure 3 respectively.

In the drawings, the usual furnace structure is shown at 1 which is surrounded by the spaced sheet metal casing 2, providing the necessary air space about the furnace. The auxiliary heater or heaters are arranged so.that they may be located yin the casing and between the casing and furnace body. In the drawings, there are shown two of these auxiliary heaters which are indicated as a whole by the numeral 3, the heaters being arc-shaped so as tolfit. about the furnace and being relatively narrow and high so as to secure the maximum Vheating ca acitv j i u without interfering with the circulation of` air during the time that thernain furnace 1 is being used.

yExcept `that the two auxiliary heaters are located upon opposite sidesof the furnace, they are identical and one only Vwillbe described.

The heater is supported upon brackets 9 extendingfrom the casing 2 andcomprises a base 1() which is formedwith exterior flanges 11 vwhich operate as abutments for` the lower edgesof side walls 12.l The vside walls converge upwardly as shown in Figure 4, and are held at their upper ends by flanges 13 depending from4 a curved plate the single ue 19 which leads to the chimney.

The ends of the heater are closed by end walls 30 whichare provided with parallel' flanges 31 which are received over the edges of the side walls.

The centralportion ofthe base plate is provided with parallel, upstanding ianges 20 over which is placed an inverted U-shaped burner 21 which is provided with a plurality of holes 22.

The gas is conducted from a pipe 23 through the usual valves and mixer and is discharged into one end of the burner. A small pilot light 24 leads from the main gas pipe and discharges through an opening 25 adjacent the burner. A small tube is secured onv the casing 2 and telescopes within the tube 25. The outer portion of the tube is fianged over the casing and isprovided with a small pivoted shutter 36. Between the walls of the U-shaped burner 21 and the side walls of the heater, the base plate is formed with parallel rows of holes 26 which support the combustion.

In order to distribute the products of combustion through the auxiliary heater, a longitudinal battle plate 27 extends from the end of the heater at the gas inlet to a point adjacent the remote end wall and over this baille is located a spreader plate 28 which extends through the entire length of the heater. This plate is provided with a plurality et notches 29 along each edge. The Vaction of the baille and spreader plates is to retard the flame and distribute it more evenly throughout the heater and thereby obtain a better and more efficient heating from the device. The upwardly tapering construction of the burner serves t0 retard the upward flow of the products of combustion so that further beneiicent results are obtained.

It will be seen that an etiicient, economi-A cal and easily constructed auxiliary heater has been devised. and while the description has been detailed, it will be appreciated that changes and modification may be made changes and modification may be made within the scope of the invention.

1. An auxiliary gas heater for coal furnaces, which is arcuately shaped to tit between the main furnace and the casing, said heater comprising side and end Walls, and a combined burner and base plate, the side walls converging upwardly, a battle plate and a perforated spreader located within the heater, and means to discharge the products et combustion 'from the top of the heater.

2. An auxiliary gas heater lor coal turnaces, which is arcuately shaped to lit between the main furnace and the outer casing, said heater comprisingr side and end Walls, a base plate having parallel rows of apertures along its edges, au inverted U-shaped perforated member mounted on the base plate to provide a burner in combination with the base plate, and a battle located within the heater.

3. An auxiliary gas heater for use in coal Jfurnaces, comprising an arc-shaped and relatively long and narrow base plate provided with parallel rows of apertures, an inverted U-shaped element mounted upon said base plate between said rows to provide a burner, side and end walls upon said base plate, the side walls converging upwardly, and a battle plate located within the heater above the burner.

4. An auxiliary heater iter furnaces coinprising an arcuate casing aud a burner in the bottom et said easing, said burner including an inverted U-shaped, perforated strip located on the bottom of the casing, said casing having apertures through the bottom thereof for supplying air about the burner.

ERNST F. DIEHM` 

